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- The Freescale downstream vendor kernel has a patch that exports the bch
- flash geometry via a debugfs file. This is not available in mainline linux
- kernels so the fallback method calculates the geometry based on known info
- from the mtd partition. A bug exists in this funcion where it fails to
- assume that block0 ECC is the same as the other blocks by default.
- --- a/src/mtd.c
- +++ b/src/mtd.c
- @@ -610,7 +610,7 @@ static int cal_nfc_geometry(struct mtd_d
- /* The two are fixed, please change them when the driver changes. */
- geo->metadata_size_in_bytes = 10;
- geo->gf_len = 13;
- - geo->ecc_chunkn_size_in_bytes = 512;
- + geo->ecc_chunkn_size_in_bytes = geo->ecc_chunk0_size_in_bytes = 512;
-
- if (mtd->oobsize > geo->ecc_chunkn_size_in_bytes) {
- geo->gf_len = 14;
- @@ -700,8 +700,9 @@ int parse_nfc_geometry(struct mtd_data *
- unsigned int value;
-
- if (!plat_config_data->m_u32UseNfcGeo) {
- + /* fsl kernel patch provides bch_geometry via debugfs */
- if (!(node = fopen(dbg_geometry_node_path, "r"))) {
- - fprintf(stderr, "Cannot open BCH geometry node: \"%s\"",
- + fprintf(stderr, "Cannot open BCH geometry node: \"%s\"\n",
- dbg_geometry_node_path);
- return cal_nfc_geometry(md);
- }
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